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  Topic Review (Newest First)
03-22-2019 12:08 PM
Smart Bob
Quote:
Originally Posted by Foolios View Post
Could you provide a link to the AGM battery you bought from O'Reilly, please?

So a Group 47, that's like the capacity of the battery? Say 110 Amp Hours?
What I was thinking is that 110AH battery is overkill. So I was wondering if something much smaller like a 30 amp hour battery would suffice?
Just go to the O'Reilly's Auto Parts website. The group # is the BCA designation for the battery size case.
03-22-2019 06:36 AM
Foolios
Quote:
Originally Posted by Smart Bob View Post
I have two Group 47 AGM batteries in both of our smart cars that I acquired from O'Reilly's Auto Parts. I don't think they are lighter then a flooded cell group 47 battery. Also, the provision to attach the vent tube is provided on the AGM batteries that I have.
Could you provide a link to the AGM battery you bought from O'Reilly, please?

So a Group 47, that's like the capacity of the battery? Say 110 Amp Hours?
What I was thinking is that 110AH battery is overkill. So I was wondering if something much smaller like a 30 amp hour battery would suffice?
03-21-2019 04:14 PM
Smart Bob I have two Group 47 AGM batteries in both of our smart cars that I acquired from O'Reilly's Auto Parts. I don't think they are lighter then a flooded cell group 47 battery. Also, the provision to attach the vent tube is provided on the AGM batteries that I have.
03-21-2019 07:25 AM
Foolios Thinking about this vented tube and guessing it's because of the Lead Acid battery being used. If I used a lighter AGM battery, wouldn't need to worry about venting then right? And the lighter battery(plus tube removal) would just make it easier to work with plus less weight in the car.

Yay, Nay?

Quote:
Originally Posted by Spentit View Post
My 2017 ED had a similar problem as it would not start in my home garage, so I hooked up my battery charger and in just a few seconds the car could be started and all seemed fine. The main battery of the car charges the 12v battery once the car is started so the 12v was brought to normal in just a few minutes.

Since I didn't want this to happen again and since there's no gauge that measures the health of the 12v battery, I installed a bluetooth battery monitor. It tells me what the battery
I'm still interested in this bluetooth battery monitor.
03-03-2019 09:53 AM
Foolios Has anyone tried using a supercapacitor instead of a lead acid battery? The lighter weight seems like something that would really be beneficial.
02-24-2019 11:22 AM
jwight
Quote:
Originally Posted by Foolios View Post
It does, except for the shorter warranty period.....
02-18-2019 01:59 PM
MB DNA
Quote:
Originally Posted by Yinzer View Post
Is the Smart 12V battery an AGM or flooded type? I guess becasue of its unusual "indoor" location, it needs to be AGM. That explains some of the reliability issues Smart owners have reported. (AGM's are not as robust as flooded).
It needn't be AGM as the OEM is the standard (flooded) 47H5 - note that the battery is VENTED TO THE OUTSIDE through a tube that exits the bottom of the battery box.

As for 12V battery reliability issues - could it be the constant 3-cylinder vibrations through the frame PLUS the harsh ride (limited shock absorption) that causes the grids to deteriorate?
02-18-2019 01:33 PM
Yinzer The battery Foolios linked to is an AGM (i.e. absorbent-glass-mat-non-spillable) battery. Is the Smart 12V battery an AGM or flooded type? Do you hear sloshing of liquid electrolyte when you remove it? I guess becasue of its unusual "indoor" location, it needs to be AGM . That explains some of the reliability issues Smart owners have reported. (AGM's are not as robust as flooded).
02-18-2019 12:37 PM
Smart Bob Group 47 is the correct battery. Make sure you connect the vent tube. Also, to r & R the battery, you have to tilt the battery at the rear.
02-17-2019 08:37 PM
Foolios Does this look right?

https://www.amazon.com/ACDelco-47AGM.../dp/B010GLMYEW
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